XLS Series amplifiers are professional stereo power amplifiers engineered to meet demanding audio requirements reliably and within budget. Plus, every XLS Series amplifier is backed by Crowns unequaled Three-Year, No-Fault, Fully-Transferable Warranty. The XLS Series of power amplifiers from Crown represents a new era in affordable, quality power amplification. The line consists of four models in a uniform, rugged 2U chassis.